高温叠层板状结构流致振动特性研究  

Study on Flow Induced Vibration Characteristics of Laminated Plate Structure under High Temperature

作　　者：蒋天泽 李朋洲[1] 马建中[1] 高李霞[1] 张晓玲[1] Jiang Tianze;Li Pengzhou;Ma Jianzhong;Gao Lixia;Zhang Xiaoling(Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院,成都610213

出　　处：《核动力工程》2022年第S01期132-136,共5页Nuclear Power Engineering

摘　　要：为研究高温对叠层板状结构流致振动特性的影响,对考虑了粘性不可压缩流体作用下的简化叠层板状结构建立动力学方程。通过特征矩阵求解,分析了3个受温度影响的参数(叠层板材料弹性模量、冷却水密度和饱和水粘性)对叠层板固有频率和失稳临界流速的敏感性影响,进而研究了3个参数同时变化时,温度对叠层板状结构流致振动特性的影响。计算结果表明,随着温度升高,叠层板在静水和动水中的固有频率逐渐降低;叠层板材料弹性模量降低造成叠层板刚性下降对叠层板固有频率的影响最大,同时失稳临界流速先降低再逐渐升高,但变化幅度不大;冷却水密度降低造成的附加质量降低对失稳临界流速的影响最大。In order to study the effect of high temperature on the flow induced vibration characteristics of laminated plate structure,a dynamic equation is established for the simplified laminated plate structure considering the action of viscous incompressible fluid.By solving the characteristic matrix,the sensitivity effects of three temperature-affected parameters(elastic modulus of laminated material,cooling water density and saturated water viscosity)on the natural frequency and critical velocity of instability of laminated plate are analyzed.Furthermore,the effect of temperature on the flow induced vibration characteristics of laminated plate structure is studied when the three parameters change at the same time.The results show that the natural frequencies of laminated plate in static and dynamic water decrease with the increase of temperature;the decrease of the elastic modulus of the laminate material leads to the decrease of the rigidity of the laminated plate,which has the greatest effect on the natural frequency of the laminated plate.At the same time,the critical velocity of instability decreases at first and then increases gradually,but the change range is not significant;the additional mass reduction caused by the reduction of cooling water density has the greatest effect on the critical velocity of instability.

关 键 词：高温 叠层板 振动特性 流弹失稳 

分 类 号：TL33[核科学技术—核技术及应用] O327[理学—一般力学与力学基础]